What it means
LG's error code list puts a number on it: the defrost sensor didn't see the temperature rise by more than 5°C within 80 minutes of the defrost starting. It can show as F dH or r dH on some models.
What to check, in order
- Reset the power
Unplug the fridge from the wall, wait about 5 minutes and plug it back in.
- Empty it and put towels down
If the code comes back, take out all the food and put dry towels on the floor in front of the doors.
- Defrost with the doors open
Unplug it and leave the doors wide open. LG's general advice is at least 12 hours. Its US page for F dH says about a day in summer and up to three days in winter, so the ice blocking the drain can melt completely.
- Plug back in
Once the ice has gone, water should drain to the tray normally again. Plug it back in and close the doors.
When to call an engineer
If the code comes back after a full defrost. LG says a technician needs to check it, and a disconnected heater or temperature fuse, or a main board fault, isn't a home repair.
Good to know
- LG says frequent dH errors can reduce cooling and affect food quality, so contact LG even if a defrost clears it for a while.
- Er dS is a related code: LG says it means a fault in the defrost temperature sensor, and the evaporator may then get blocked by ice.
Quick answers
What does the LG Er dH error code mean?
The fridge started a defrost, but the temperature didn't come back to normal afterwards. LG says the cause can be ice blocking the drain, or a failed heater, temperature fuse or main board. LG's error code list puts a number on it: the defrost sensor didn't see the temperature rise by more than 5°C within 80 minutes of the defrost starting. It can show as F dH or r dH on some models.
Can I fix LG Er dH myself?
Very easy (12 hours to 3 days, mostly waiting). Start with: reset the power; empty it and put towels down; defrost with the doors open. If the code comes back after a full defrost. LG says a technician needs to check it, and a disconnected heater or temperature fuse, or a main board fault, isn't a home repair.
Is LG Er dH worth repairing?
Worth fixing. A defrost clears the ice for now. If a heater or fuse has failed, it's usually a modest repair; a main board costs more.
Checked against
- LG US: troubleshooting an F dH or r dH error code
- LG UAE: how to troubleshoot the error codes on your refrigerator
- LG US: refrigerator digital and analog error codes
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.